7-iodo 8-hydroxy quinoline 5-sulphonic acid (Ferron) as a colloidal electrolyte

Abstract

Electrical conductance studies have been performed to investigate the nature of aqueous solutions of 7-iodo 8-hydroxy quinoline 5-sulphonic acid (Ferron). The reagent has been found to behave as a colloidal electrolyte and does not obeyBeer's law in concentrated solutions. The curve between the square root of concentration and equivalent conductance is not linear and resembles those of colloidal electrolytes. The temperature of zero conductance has also been determined to be −32 ‡C. The temperature coefficient per degree centrigrade per 100 of the conductance at 35 ‡C ranges between 1.56 and 1.72.